Abstract
This study is the research of Roller Compacted Concrete Pavement（RCCP）using recycled concrete aggregate. Recently, the development of the usage of the recycled concrete aggregate is demanded in Japan. This is because the aggregate is generated along with the renewal of a concrete structure. On the other hand, concrete pavement is less than 5％ of all pavements in Japan. It is necessary to spread the concrete pavement for the advancement of the technology.
The aggregate for this experiment contained a lot of river gravel. It was concerned that it wouldn’t compact thoroughly because of smooth surface properties. So the mixing rate for the recycled concrete coarse aggregate was substituted for virgin coarse aggregate by 0％, 50％, and 100％, and the influence on the workability was examined at the laboratory experimentation and trial construction. In laboratory experimentations, the influence that it had on the consistency and the bending strength was investigated. And in trial construction, the bending strength, the drying shrinkage, soundness loss, relative compaction and skid resistance was investigated.
As the result, RCCP using recycled concrete aggregate has less unit volume of water and more consistency-loss than using virgin aggregate. Also it has less drying shrinkage than slump concrete. Furthermore, recycled concrete has an equal workability with RCCP to that of virgin coarse aggregate, in this range of experiment.
